In telecommunication, a recorder warning tone is a tone transmitted over a telephone line to indicate to the called party that the calling party is recording the conversation.
In the US, the recorder warning tone is a half-second burst of 1400 Hz applied every 15 seconds. The recorder warning tone is required by law to be generated as an integral part of any recording device used for the purpose and is required to be not under the control of the calling party. The tone is recorded together with the conversation.
Famous quotes containing the words warning and/or tone:
“We have not the motive to prepare ourselves for a “life-work” of teaching, of social work—we know that we would lay it down with hallelujah in the height of our success, to make a home for the right man. And all the time in the background of our consciousness rings the warning that perhaps the right man will never come. A great love is given to very few. Perhaps this make-shift time filler of a job is our life work after all.”
—Ruth Benedict (1887–1948)
“He doesn’t know a damn thing about China ... That’s what makes him an expert. He knows nothing about music, being tone deaf. That’s what makes him a musician ... And he’s batty in the head. That’s what makes him a philosopher.”
—William Carlos Williams (1883–1963)